2 papers
physics.optics2026
Degenerate four-wave mixing in a CPT-symmetric coupler with intermodal dispersion
Nguyen Duc Anh Quan, Do Duc Tho, Marek Trippenbach +3
Four-wave mixing provides a simple setting in which dispersion, nonlinearity, and non-Hermiticity compete to select resonant energy-transfer channels. We study degenerate four-wave…
nlin.PS2026
Re-entrant parity-time phase transitions in locally coupled ring resonators
Nguyen Duc Anh Quan, Le Xuan The Tai, Doan Quang Tri +3
We investigate two parity-time-symmetric ring resonators coupled over a finite angular region described by a super-Gaussian profile. In the linear regime, analytical spectra are ob…